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Full Discussion: Telnet vs netcat behavior
Top Forums UNIX for Advanced & Expert Users Telnet vs netcat behavior Post 302910336 by ckmehta on Wednesday 23rd of July 2014 04:27:22 PM
Old 07-23-2014
Telnet vs netcat behavior

Currently I run a number of network tests using netcat that checks for an open port on a remote IP-address, using this syntax:
Code:
netcat -v -w 5 -z 107.249.95.5 4488

For some reason, the netcat command above is hanging (although others work fine), but a telnet is showing a valid connection like below:
Code:
%  telnet 107.249.95.5 4488
Trying 107.249.95.5...
Connected to 107.249.95.5.
Escape character is '^]'.
^]

Normally with my other netcat tests, I see an immediate result like this:
aaaa.XXX.com [102.19.5.62] 22 (ssh) open
aaaa.XXX.com [102.19.5.62] 23 (telnet): Connection timed out

The only thing different/interesting about the 107.249.95.5 address is that it is over a VPN to an MQ server.

Any idea why this network test is failing, even though its obviously connectable over telnet. If it matters, I am running this on a Solaris 10 box.

Last edited by ckmehta; 07-23-2014 at 05:32 PM..
 

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PAPS(1) 						      General Commands Manual							   PAPS(1)

NAME
paps - UTF-8 to PostScript converter using Pango SYNOPSIS
paps [options] files... DESCRIPTION
paps reads a UTF-8 encoded file and generates a PostScript language rendering of the file. The rendering is done by creating outline curves through the pango ft2 backend. OPTIONS
These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. --landscape Landscape output. Default is portrait. --columns=cl Number of columns output. Default is 1. --font=desc Set the font description. Default is Monospace 12. --rtl Do rtl layout. --paper ps Choose paper size. Known paper sizes are legal, letter, a4. Default is A4. --bottom-margin=bm Set bottom margin in postscript points (1/72 inch). Default is 36. --top-margin=tm Set top margin. Default is 36. --left-margin=lm Set left margin. Default is 36. --right-margin=rm Set right margin. Default is 36. --help Show summary of options. --header Draw page header for each page. --markup Interpret the text as pango markup. --encoding=ENCODING Assume the documentation encoding is ENCODING. --lpi Set the lines per inch. This determines the line spacing. --cpi Set the characters per inch. This is an alternative method of specifying the font size. --stretch-chars Indicates that characters should be stretched in the y-direction to fill up their vertical space. This is similar to the texttops behaviour. AUTHOR
paps was written by Dov Grobgeld <dov.grobgeld@gmail.com>. This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others). April 17, 2006 PAPS(1)
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